【正文】 本科生畢業(yè)論文 1 摘 要 隨著電力電子裝置大量的應用到生產(chǎn)生活當中，它們使電能的轉換應用變得更加容易，但同時也給電力系統(tǒng)帶來了嚴重的諧波污染。目前，并聯(lián)有源電力濾波器 (shunt active power filter， SAPF)已成為無功和諧波動態(tài)補償?shù)挠行侄沃?。在三相四線制電力系統(tǒng)中除了無功和諧波需要治理，負載不平衡問題也變得日益突出，因此，本文研究與設計適用于三相四線制下的 SAPF來解決這些問題。 針對三相四線制 SAPF諧波電流檢測問題，本文詳細的推導基于瞬時無功理論的 qp ii ? 算法，論證它無需改進即可直接應用到三相四線制系統(tǒng)里；選擇了滯環(huán)比較法作為補償電流的控制策略；采用了 三 橋臂變流器作為 SAPF的 主電路 。 文章的最后，利用 MATLAB/Simulink 軟件，搭建了仿真平臺，對主電路出線電感參數(shù)和軟啟動方案進行單獨仿真分析，證明電感值參數(shù)選擇的合理和軟啟動方案可行。對 SAPF 和所要補償?shù)南到y(tǒng)進行了整體仿真，結果證明在所選參數(shù)下，能夠?qū)ζ胶夂筒黄胶夥蔷€性負載所帶來的諧波有很好的動態(tài)補償效果，對不平衡負載有很好的平衡 作用；進而也說明檢測方法正確，控制策略得當。 關鍵詞 諧波動態(tài)補償；并聯(lián)有源電力濾波器；三相四線制； qp ii ? 算法 MATLAB/Simulink 本科生畢業(yè)論文 2 Abstract With extensive application of power electronic devices in production and life,they make power energy conversion and application easily, but also lead to the serious harmonic pollution in the power system. At present, the shunt active power filter (SAPF) has been an effective way to dynamically pensate reactive power and harmonic. In addition to these problems, the load unbalance is more and more serious in threephase fourwire system, therefore, SAPF applied to threephase fourwire system is researched and designed to solve these problems in this paper. For the harmonic current detection of SAPF in threephase fourwire system, the qp ii ? algorithm based on the instantaneous reactive theory is detailedly derived, and this algorithm is demonstrated it could be directly applied to threephase and fourwire system without being improved. Hysteresisband parison method is chosen as pensation current control strategy. The threeleg converter which has clear division is adopted as the main circuit. At the end of the paper, the simulation platform is built by use of MATLAB/Simulink software. The output inductance parameter and softstart scheme are simulated respectively. The results prove that output inductance parameter is reasonable and the softstart scheme is feasible. Then, the integrated simulation for SAPF and pensation system is carried out. Finally, simulation results show that SAPF has a good pensation characteristic for the harmonic produced by the balance and unbalance nonlinear loads, and balances threephase loads in threephase and fourwire system. At the same time, simulation results show that harmonic detection method is correct and the control strategy is proper. Keywords ： harmonic dynamic pension； shunt active power filter； threephase fourwire system； qp ii ? algorithm； MATLAB/Simulink 本科生畢業(yè)論文 3 第一章 緒論 ................................................................................................................... 5 諧波概述及其危害 .............................................................................................. 5 諧波抑制強 ................................................................................................. 6 無源電力濾波器 ....................................................................................... 6 有源電力濾波器 ....................................................................................... 6 混合型有源電力濾波器 ............................................................................ 8 有源電力濾波器的發(fā)展和應用 ............................................................................ 9 有源電力濾波器的發(fā)展 ............................................................................ 9 有源電力濾波器的應用 ............................................................................ 9 本文的研究的意義和內(nèi)容設置及主要任務 ......................................................... 10 第二章 三相電路諧波及無功電流的檢測 ........................................................................11 基于瞬時無功功率理論的電流檢測方法 .............................................................11 瞬時無功理論原始定義及發(fā)展 .................................................................11 2. 1. 2 瞬時無功功率理論 ..................................................................................11 2. 1. 3 坐標變換 ............................................................................................... 16 三相四線制系統(tǒng)中基于瞬時無功功率理論的檢測方法 ..................................... 17 qp? 法檢測電流 ................................................................................ 17 2． 2． 2 qd ii ? 指令運算方法 ........................................................................... 17 諧波分量的處理 ............................................................................................... 18 對基波零序分量的處理 .......................................................................... 18 對基波負序分量和高次諧波分量的處理 .................................................. 19 qp? 運算方式和 qp ii ? 運算方式的優(yōu)缺點 ....................................................... 19 第三章 并聯(lián)型三相四線制補償電流發(fā)生電路方案選擇 .................................................. 20 三相四線制系統(tǒng) APF主電路形式和結構選擇設計 .............................................. 20 本科生畢業(yè)論文 4 四相變流器結構形式 .............................................................................. 21 三相變流器結構 ..................................................................................... 21 3. 2 三相四線并聯(lián)型有源電力濾波器主電路的參數(shù)選擇 ........................................... 22 3. 2. 1 主電路容量的確定 .................................................................................. 22 3. 2. 2 系統(tǒng)開關頻率 ........................................................................................ 22 3. 2. 3 電容總電壓的選擇 .................................................................................. 23 3. 2. 4 電容選擇準則和參數(shù)選擇 ....................................................................... 24 3. 2. 5 交流進線電感選擇準則和參數(shù)選擇 ......................................................... 25 電流跟蹤控制電路 ............................................................................................ 26 三角波比較方式 ....................................................................